I too am researching for family from Halmi. Their names are Gewurtz and Blau. I was in Transylvania last year and I hooked up with a translator who was invaluable in helping locate records. With his help I was able to obtain birth records for greatparents in Halmi. His pricing was very reasonable and if you need a name I'll be happy to pass it along to you. Let me know.
I wanted to let you know that if you looking for records pre-1900 then you will have to search the records located in Satu Mare. Hope this helps